package com.kova.api.utils;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;


public class IpUtil {

	public static String getIpAddr(HttpServletRequest request) {
		String ipAddress = null;
		ipAddress = request.getHeader("x-forwarded-for");
		if (ipAddress == null || ipAddress.length() == 0
				|| "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0
				|| "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0
				|| "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getRemoteAddr();
			if (ipAddress.equals("127.0.0.1") || ipAddress.endsWith("0:0:0:0:0:0:1")) {
				// 根据网卡取本机配置的IP
				InetAddress inet = null;
				try {
					inet = InetAddress.getLocalHost();
					ipAddress = inet.getHostAddress();
					//System.out.println("host name ="+inet.getHostName());
				} catch (UnknownHostException e) {
					e.printStackTrace();
				}
			}

		}

		// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if (ipAddress != null && ipAddress.indexOf(",") > 0) {
			ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
		}
		return ipAddress;
	}

	/**
	 * 获取本机ip
	 * @return
	 */
	public static String getLocalMachineIp(){
		try {
			InetAddress addr = InetAddress.getLocalHost();
			return addr.getHostAddress();
			//System.out.println("Local HostAddress: "+addr.getHostAddress());
			//String hostname = addr.getHostName();
			//System.out.println("Local host name: "+hostname);
		}catch (Exception ex){
			ex.printStackTrace();
		}
		return "";

	}
}
